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run code in 150+ php & hhvm versions
Bugs & Features
<?php interface Foo {} class Bar implements Foo {} var_dump(is_a('Bar', 'Foo', true)); var_dump(is_a('Bar', 'Bar', true)); var_dump(is_subclass_of('Bar', 'Foo')); var_dump(is_subclass_of('Bar', 'Bar'));
Output for 5.3.9 - 5.6.22, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(true) bool(true) bool(true) bool(false)
Output for 5.3.7 - 5.3.8
Warning: is_a() expects exactly 2 parameters, 3 given in /in/gPsXY on line 6 NULL Warning: is_a() expects exactly 2 parameters, 3 given in /in/gPsXY on line 7 NULL bool(true) bool(false)
Output for 5.3.0 - 5.3.6
Warning: is_a() expects exactly 2 parameters, 3 given in /in/gPsXY on line 6 NULL Warning: is_a() expects exactly 2 parameters, 3 given in /in/gPsXY on line 7 NULL bool(false) bool(false)
Output for 5.0.0 - 5.2.17
Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/gPsXY on line 6 Warning: Wrong parameter count for is_a() in /in/gPsXY on line 6 NULL Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/gPsXY on line 7 Warning: Wrong parameter count for is_a() in /in/gPsXY on line 7 NULL bool(false) bool(false)
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/gPsXY on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/gPsXY on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/gPsXY on line 2
Process exited with code 255.